ASCII represents characters using integer codes from 0 - 127. This tool converts between readable text and ASCII code representations for quick inspection, copy/paste, and debugging. 🧰🔎

What you can do

• Encode text into ASCII codes (Numbers) or HTML numeric entities (Entities).
• Decode ASCII codes or entities back into readable text.
• Swap inputs to quickly convert back and forth while testing.

How it works

• Encode turns each character into an ASCII code using your chosen Format:
  • Entities (default): concatenated HTML entities like Hello
  • Numbers: space-separated decimal values like 72 101 108 108 111
• Decode reverses the process:
  • From Entities: parses sequences like &#NNN;
  • From Numbers: accepts decimal tokens separated by spaces, commas, or new lines

Format quick reference

Buttons

• Encode »: Encode the left textarea into the selected format and show it on the right.
• Decode »: Decode the left textarea according to the selected format and show it on the right.
• « Swap »: Swap left and right textareas to continue converting back and forth.
• Copy Result 📋: Copy the right textarea to your clipboard.

Examples

• Hello → Numbers: 72 101 108 108 111
• Hello → Entities: Hello
• A! → Numbers: 65 33
• Space () → Numbers: 32

Tips

• If decoding numbers, you can paste messy input like 72,101,108 or line-separated values - separators don't matter much ✅
• If you only see entities in your output, that's normal for the Entities format - those are meant to be HTML-friendly.

Notes & limitations

• ASCII is 0 - 127. Characters above 127 are not standard ASCII and may not round-trip as expected.
• Control codes (0 - 31 and 127) may not display as readable characters.
• For full Unicode support, use the Unicode or UTF-8 converters.